The following code example demonstrates how you can use WorkflowRuntime functionality from a workflow host. It provides examples of how to use the WorkflowRuntime constructor and the AddService, StartRuntime, and StopRuntime methods. The code also shows the recommended method to create a WorkflowInstance object in a workflow host using the CreateWorkflow method. It also shows how to set event handlers for the WorkflowCompleted, WorkflowIdled, and WorkflowTerminated events.
This code example is part of the Canceling a Workflow SDK Sample from the Program.cs file. For more information, see Canceling a Workflow.
Shared Sub Main()
Dim connectionString As String = "Initial Catalog=SqlPersistenceService;Data Source=localhost;Integrated Security=SSPI;"
Using workflowRuntime As New WorkflowRuntime()
Dim dataService As New ExternalDataExchangeService()
workflowRuntime.AddService(dataService)
dataService.AddService(expenseService)
workflowRuntime.AddService(New SqlWorkflowPersistenceService(connectionString))
AddHandler workflowRuntime.WorkflowCompleted, AddressOf OnWorkflowCompleted
AddHandler workflowRuntime.WorkflowTerminated, AddressOf OnWorkflowTerminated
AddHandler workflowRuntime.WorkflowIdled, AddressOf OnWorkflowIdled
AddHandler workflowRuntime.WorkflowAborted, AddressOf OnWorkflowAborted
Dim workflowInstance As WorkflowInstance
workflowInstance = workflowRuntime.CreateWorkflow(GetType(SampleWorkflow))
workflowInstance.Start()
waitHandle.WaitOne()
workflowRuntime.StopRuntime()
End Using
End Sub
static void Main()
{
string connectionString = "Initial Catalog=SqlPersistenceService;Data Source=localhost;Integrated Security=SSPI;";
using (WorkflowRuntime workflowRuntime = new WorkflowRuntime())
{
ExternalDataExchangeService dataService = new ExternalDataExchangeService();
workflowRuntime.AddService(dataService);
dataService.AddService(expenseService);
workflowRuntime.AddService(new SqlWorkflowPersistenceService(connectionString));
workflowRuntime.StartRuntime();
workflowRuntime.WorkflowCompleted += OnWorkflowCompleted;
workflowRuntime.WorkflowTerminated += OnWorkflowTerminated;
workflowRuntime.WorkflowIdled += OnWorkflowIdled;
workflowRuntime.WorkflowAborted += OnWorkflowAborted;
Type type = typeof(SampleWorkflow1);
WorkflowInstance workflowInstance = workflowRuntime.CreateWorkflow(type);
workflowInstance.Start();
waitHandle.WaitOne();
workflowRuntime.StopRuntime();
}
}